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For which (k) will (y=18+(k-2)x) show linear growth?

Answer and explanation

Correct answer: \(k>2\)

In \(y=18+(k-2)x\), the coefficient of \(x\), or slope, is \(k-2\). For linear growth, the slope must be positive, so \(k-2>0\). Hence, \(k>2\). When \(k=2\), \(y=18\) is constant, not increasing. Exam tip: in \(y=mx+c\), check \(m>0\) for linear growth.

Related tags

Linear GrowthSlopeLinear EquationsParameter ConditionInequalitiesPolynomialsLinear Growth And DecayIntroduction To Polynomials

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